Journal
NANOSCALE
Volume 3, Issue 10, Pages 4088-4093Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1nr10867k
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology (MEST) of Korea [2010-0014992, 2010-0028821, 2010-0001842, R31-2008-10029]
- Korea Institute of Energy Technology Evaluation and planning (KETEP)
- Ministry of Knowledge Economy [20103020010010]
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Highly efficient quantum-dot-sensitized solar cell is fabricated using ca. 2-3 nm sized perovskite (CH(3)NH(3))PbI(3) nanocrystal. Spin-coating of the equimolar mixture of CH(3)NH(3)I and PbI(2) in gamma-butyrolactone solution (perovskite precursor solution) leads to (CH(3)NH(3))PbI(3) quantum dots (QDs) on nanocrystalline TiO(2) surface. By electrochemical junction with iodide/iodine based redox electrolyte, perovskite QD-sensitized 3.6 mu m-thick TiO(2) film shows maximum external quantum efficiency (EQE) of 78.6% at 530 nm and solar-to-electrical conversion efficiency of 6.54% at AM 1.5G 1 sun intensity (100 mW cm(-2)), which is by far the highest efficiency among the reported inorganic quantum dot sensitizers.
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